Nose board for axminster looms



Dec. 21, 1943, w. Y. ROBB 2,337,415

NOSE BOARD FOR AXMINS'IER LOOMS 7 Original Filed Nov. 5, 1941 ll INysN'roR WALTER Y, Rees ATTORNEY Patented Dec. 21, 1943 eras- NQSE BUARB- FGR INS TEE LQOMS Walter Y. Robb, Whitinsville, Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass a corporation of Massachusetts 6 Claims.

This invention relates to nose boards for AX- ininster looms and it is the general object of the invention to provide a nose board so constructed as to be self-clearing of lint during loom operation.

In a type of Axminster loom which has gon into general use for the manufacture of fabrics the patterns of which show on the back there is employed a nose board having a series of teeth spaced by slots which are entered by the reed dents and also by guide plates aligned with the reed dents. During the weaving operation considerable lint in the form of fibers is broken away from the tuft forming yarns and is pushed into the nose board slots by the reed. When nose boards of the type heretofore used are employed the lint accumulates to such. an extent as to interfere with the free motion of the reed dents and guide plates in their slots. It is an important object of my present invention to form the -cse board with teeth which project downwardly from a part of the cloth board which lies above the guide plates and form an open space below the cloth board in front of the upper ends of the teeth into which the lint and fibers are pushed by the reed.

The aforesaid guide plates are directed rearwardly at periodic intervals during loom operation and must align. with their respective reed dents in order to form guide aisles for the tuft forming yarns. It is another object of my present invention to provide the nose board with teeth which hold the rear ends of the guide plates in the slots and overlap the plates only a slight amount so that the larger part of the plates move out of the slots when advancing to their forward position and thus carry the lint forwardly from the slots.

It has been customary heretofore to form that part of the cloth board immediately over the guide plates with, guide slots for the plates. The tops of these slots have been located above the guide plates so that lint lying in the upper part of the slots is out of the path of the guide plates. It is another object of my present invention to form that part of the under side of the cloth board immediately over the guide plates when the latter are forward with a smooth surface to lint will not adhere and perform the guiding function for the plates by the previously mentioned teeth.

With these and other objects in view which will appear as the description proceeds, my in-. vention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a side elevation of part of an AX- minster loom having my invention applied thereto, the lay shaft being shown in section and the reed and guide plates being shown in their forforward position in full lines and their rearward position in dotted lines,

Fig. 2 is a bottom plan of a part of the nose board forming the subject matter of my present invention, and

Fig. 3 is a vertical section on line 33 of Fig. 2 with a guide plate added and shown in forward position.

The drawing shows only that part of an Axininster loom to which my invention more particularly relates. For a fuller understanding of other parts of the loom and also for the relation between the reed dents and the guide plates ref erence may be had to Patent No. 1,958,129.

Referring to Fig. l the breast beam it supports a cloth board ii having rearwardly projecting eeth i2 separated by slots or spaces l3 which receive the dents i l of the reed designated generally at R. The upper rear part of each tooth is formed with a hook l5 which projects above the flat top surface of the cloth board.

The reed is mounted on an elongated angle member ll secured to arms it; which extend upwardly from split hubs l9 having front and back sections 28 and 2t, respectively, held together by bolts 22. The split hubs, one of which is shown in the drawing, are clamped firmly to the lay shaft 25 as that the reed oscillates toward and from the cloth board between the dotted and full line positions of Fig. 1 when the shaft 25 oscilla es to the left and to the right, respectively. The lay has a complete reciprocation for each beat of the loom.

The tube frame 25 may be of the usual form and has depending therefrom yarn tubes 2'! from the lower ends of which project the tuft forming color yarns By means of mechanism not shown herein the tube frame is dipped through the warp shed defined by the upper and lower binder warps Bi and B2, respectively, after which the yarn tubes move forwardly in the usual manner to cause the tuft yarns to approach the teeth of the nose board. The reed then moves forwardly to beat up the picl: of filling behind the tuft yarns and the latter over and to positions in front of the hooks H5.

in order that the tuft yarns 25 may be guided to their respective teeth 52 there is provided a series of guide plates is mounted on a carrier 35 supported by an angle bar 32 extending across the loom. The bar 32 is mounted on spaced arms 33 and caused to move backwardly and forwardly by means of a vertically reciprocating rod 34 in such a manner as to move the plates to rearwardly when the reed is near back center position and after the tuft yarns have been dipped through the warp sheds. The plates 3% move rearwardly only on tuft forming beats of the loom, or every third pick when so-called three shot Axminster fabric is woven.

For certain purposes of my invention I' prefer to mount the guide plates 30 so that they are concentric with the reed While this is not an essential feature of my present invention its use is advantageous with the cloth board set forth in detail hereinafter. In order to efiect co-axial movement of the plates 3% and the reed I provide a mounting for the guide plates consisting of a bearing to on shaft 25 for each arm 33 and preferably split to have front and back parts 4! and respectively, which are held together by bolts 33. The bolts do not clamp the bearing tightly on the shaft 25 but permit free rotation of the arms 33 around the shaft independently of motion of any part carried by the shaft, such as the reed, when rod S i moves. Collars 35 may be secured to the shaft 25 to hold the split bearings of the arms 33 in correct longitudinal position along the shaft 25.

The matter thus far described operates in the manner, and reference may be had to the aforesaid patent and also to my copending application Serial No. 417,608, now Patent No.

division, for further description of the fore-- going.

The details of my improved cloth board are shown in Figs. 2 and 3 which set forth more par ticularly the shape of the teeth l2 and the under side of that part of the cloth board in front of the teeth. When the reed moves to the full line position shown in Fig. 1 in order to form tufts any fibers which have been broken away from the tuft yarns are moved forwardly into the slots it. In. order to allow the major part of these fibers to fall out of the slots i3 I form each tooth it. with depending foot 18 the forward lower corner id of which extends in front of the rear vertical edges d of plates 36 and below the top edges i i of the plates when the latter are in their foremost position as shown in Fig. 3. The plates are therefore always in register with the slots iii will be guided by their teeth into correct alignment with the reed dents.

The forward edge T2 of each foot it extends upwardly to a point considerably above the top edge ii of the plates 33 to define an open space 53 in which fibers can be moved by the reed dents. That part of the under side of the cloth board in front of the shoulders '15 which define the front limits of the slots i3 is smooth, as indicated at it in 2, and therefore offers no projections or pockets to receive the fibers. Surface can be smooth since it does not serve herein to guide the plates 36, that function being performed by slots l3 and the feet it. Because of the location of the axis of shaft with respect to the cloth board and the reed dents the latter are given a slight downward motion as they approach front center position the effect of which is to move fibers which may have accumulated in the upper forward parts of slots l3 downwardly into the space 13.

In the operation of my invention the. front edges 5! of the reed dents l2 will move forwardly to the line aa, Fig. 3 to keep those portions of the slots l3 behind line aa substantially clear of lint and fibers. When the plates 38 are moved rearwardly their upper edges will move along an arc b-h, Fig. 3 to keep all portions of the slots therebelow clear of lint accumulations. The only part of slot 13 not actually traversed by the reed dents or the plates 3t is that small portion lying in front of line (1-1; and above are 12-h, but the cloth board is narrow in section at this point due to space 73. When the plates Sal move forwardly, or to the left as viewed in Fig. 1, from the dotted line position to the full line position their front advancing edges, and also their tops, will move downwardly along the inclined arc b-b to drag lint or accumulations out of the upper forward parts of the slots 53 into the space or notch '53 prior to arrival of the reed dents to their foremost position. The under surface it lies close to the arc bb, and there is consequently very little space in which any substantially mass of lint can accumulate under the cloth board.

From the foregoing it will be seen that I have provided a nose board so formed as to provide a clear space 13 above the guide plates and in front of the forward end of the feet it toward which lint is pushed by the reed dents when the lay reaches front center. It will also be seen that the lower ends of the teeth 52 project forwardly of the rear edges of the guide plates when the latter are in forward position to maintain the guide plates in proper alignment with their respective reed dents, and that the greater part of the guide plates extend forwardly from the teeth in an otherwise open space into which the lint can fall when moved forwardly by the advancing guide plates. It will further be seen that the under surface of the cloth board in front of the teeth I2 is smooth and will not accumulate lint, this condition being possible because the lower ends of the nose board teeth serve as guides for the plates. Furthermore, it will be seen that the greater part of each slot i3 is traversed either by its reed dent or the guide plate and that the small part of the slots 53 not actually traversed by these parts lie over the aforesaid open space and is in a part of the cloth board thin enough to possess adequate strength but not thick enough to accumulate objectionable amounts of lint.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In an Axminster loom the front edges of the reed dents of which move forwardly to a given position in slots in a nose board and wherein guide plates traverse a given back and forth path through said slots, teeth on said nose board between said slots having front edges extending across said back and forth path and in front of said given position and terminating a short distance in front of the rear edges of said guide plates when the latter are in their forward position so. that the greater part of the upper edges of said guide plates are out of said slots.

2. In an Axminster loom the front edges of the reed dents of which move forwardly to a given 1 position in slots in a nose board and wherein point above said path and then forwardly above said path to the nose board to define an open space above the path of the guide plates for the discharge of lint.

3. In an AXminster loom the reed dents of which move forwardly in slots in a nose board and wherein guide plates traverse a given back and forth path through said slots, teeth on said nose board having front edges which extend upwardly across the path traversed by the guide plates and then forwardly over said path to define an open space above said path and below the forward portions of said teeth, the plates when in forward position having their rear edges within said slots and to the rear of the upwardly extending part of said front edges.

4. In an Axminster loom having reed dents the front edges of which move forwardly to a given position in slots in a nose board and wherein guide plates traverse a given back and forth path through said slots, the front edges of the reed dents when in said given position extending vertically through the slots closely adjacent to the rear edges of the guide plates when the latter are in forward position and the path of said guide plates extending forwardly from said given position, teeth on said nose board between said slots having front edges forwardly of said given position and the rear edges of said plates and extending upwardly and forwardly above said given path to define an open space for the discharge of lint.

5. In an Axminster loom having reed dents and guide plates the adjacent edges of which assume given positions when said dents and plates ar in forward position and wherein a nose board has slots to receive said dents and plates, said guide plates traversing a given back and forth path through said slots, shoulders formed on the nose board at the forward ends of said slots, and teeth on the nose board extending rearwardly from said shoulders and located between said slots, the underside of the nose board presenting a smooth surface in front of said shoulders and above said path to resist adhesion of lint, and said teeth having edges forwardly of said given positions extending upwardly and then forward over said path to said smooth surface.

6. In an Axminster loom the reed dents of which move forwardly to a given position in slots in a nose board and wherein guide plates traverse a given back and forth path through said slots, the slots between the teeth extending forwardly to shoulders formed on the nose boa-rd, that part of the under side of the nose board in front of said shoulders lying above the path and being substantially smooth to resist adhesion of lint, teeth on said nose board ex tending rearwardly from said shoulder above said path to define an open space for the discharge of lint and then extending downwardly and forwardly of said given position to have guiding relation with the guide plates when the latter are in forward position.

WALTER Y. ROBB. 

